Microplastics, as indicated by their name, are tiny bits of plastic that measure less than five millimeters in diameter. That’s about the size of a small green pea! According to The Ocean Cleanup, approximately 1.2 million tons of microplastic waste are generated each year, and 1/5th of that global statistic comes from North America alone.

Primary microplastics are often manufactured for consumer products such as cosmetics, specialty soaps, clothing, and other textiles. Because plastics are prone to physically breakdown, microplastics may also form as larger debris breakdown. The road markings indicating lane separations, glossy coating all over the hull of a boat, and abandoned rubber tires are all possible sources of these secondary microplastics. 

Just last month, one study documented the highest concentrations of microplastics ever recorded within deep-sea ocean sediments: 1.9 million microplastic pieces per square meter!

The scientists were examining sediment samples from the depths of the Tyrrhenian Sea to investigate the role of deep ocean currents in microplastic transport and deposition, and all 16 of their sediment core samples were found to contain microplastic particles.

According to the Society of Environmental Toxicology and Chemistry, littering and landfill discharge are the main pathways whereby plastics enter our rivers and oceans. The density of plastic marine debris accumulated determines if plastic waste remains on the surface, becomes beached in coastal areas and estuaries, or sinks to deep-sea sediments.

As we strive to reduce plastic consumption and adopt more responsible waste management practices, it is important to address the potential impacts of microplastic movement in our oceans. Ocean circulation patterns are formed by global trade winds and forces created by the Earth’s rotation. Wind and wave patterns are essential for the temperature regulation and maintenance of healthy nutrient flow for marine organisms.

Weather conditions and ocean circulation play a significant role in the geographic distribution of microplastics. Circular ocean currents can relocate plastic marine debris from remote sources to more stationary and centralized accumulation sites called “gyres.”

Disproportionately large amounts of marine debris have been found in these areas, including the North Atlantic and Great Pacific garbage patches.

Studies have also consistently indicated that microplastics are unintentionally consumed by marine organisms. Scholars highlight the ingestion of microplastics by species marked for human consumption and the infiltration of micro- and (even smaller) nanoplastics in filtered drinking water. This is a widespread problem because most standard water treatment facilities do not effectively remove all microplastics.

Additional risks are posed by the chemical composition of microplastics. While plastics are produced, hundreds of chemical additives are used to enhance their unique characteristics. These chemicals may leach out from waste products into our waterways, disrupting the chemical composition of natural sea water while posing risks to plants and animals reliant on marine ecosystems. Studies on the biological and biochemical impacts of plastic pollution have only scratched the surface of potential effects that these materials could have over the long-term. This knowledge gap is particularly problematic for coastal and/or environmental justice communities that are more likely to be exposed to polluted waterways, contaminated drinking water, or affected marine life.

Even though microplastics have been a problematic by-product of solid waste for decades, they represent a relatively new area of multidisciplinary study. Scientists have investigated the fate of plastic marine debris in the context of the life cycle of plastics, finding that plastic cannot be chemically broken down on its own overtime. Plastic waste, instead, only physically decomposes from macro- to micro- to nano-plastics over hundreds of years.

Polymer scientists have sought to identify new possibilities for recycling plastics, including macroplastics, collected from the depths of our oceans. This has been a challenge because there are a number of unique plastic polymers used to produce the highly durable products that we use and discard. Two large areas of focus have been optimizing methodology to increase the amount of times that plastic materials can be recycled and finding new ways to transition existing materials for very different applications than their original form. One example of an area for growth is demand for composite materials made from fiberglass and carbon fibers. Engineers use these materials for building automobile and wind turbine frames. It would be ideal to satisfy their needs using reprocessed plastics, but that would require complex logistics and technology that is not yet efficiently coordinated.

“Plastics recycling with a difference” [Science Magazine]

For now, it’s best for us to stay committed to recycling efforts, strive for circularity by reusing and re-purposing materials we already own, advocate for responsible waste management within our communities, and direct advocacy efforts to hold businesses accountable for their actions. We can also seek out products that do not contain primary plastics, such as natural soaps and scrubs without microbeads, and brands that prioritize circularity by including recycled materials in their supply chain. If you crave that scrubby sensation from skincare products, try making your own with coconut oil and sugar or salt as the base ingredients. There are loads of ingenious fragrance combinations out there using essential oils that may be extracted from herbs or fruits you already have at home. In the end, it’ll have the same satisfying and nourishing effect, without negative environmental impacts!

The COVID-19 pandemic is an excellent example of how collective action can reduce our environmental impact and mitigate severe social problems. When everyone takes action based on the evidence-based recommendations of public health experts, we collectively slow the spread of the virus and protect our communities. Similarly, as more individuals (including our elected officials and corporate elites) heed the insights of climate and biological scientists regarding the impacts of climate change and plastic pollution, we reduce the risk of exacerbating harsh impacts for frontline, coastal communities.

In spite of all lessons that we could learn from this global devastation, multinational fossil fuel corporations have driven up oil production and created a rather undesirable situation for environmental interests. The supply of oil is at a peak, meanwhile demand has collapsed due to lowed economic activity during the pandemic. This has driven the price of oil below zero for the first time in history! Global oil consumption has been in free-fall as more countries introduce unprecedented measures to fight the coronavirus outbreak. The fossil fuel industry has failed to profit from this overproduction, and they shifted their efforts from fuel refinement to ethane cracking.

Simply stated, they’re diverting the methane gas and oil that we are not consuming as fuel to produce more plastic products. Ethane cracker plants are the facilities used to process the carbon-rich inputs used to create all kinds of plastic products. Their industrial activities cause immediate health and environmental detriment to nearby communities, known as frontline or fence-line communities, while exacerbating plastic pollution impacts around the globe. 

There’s more: Our team identified direct efforts by fossil fuel industry giants to ramp up demand for non-essential single-use plastics, especially plastic bags, by taking advantage of public fear and uncertainty during this time. What better time to take advantage of the public and run a manipulative campaign than a global pandemic? We are not surprised, as the fossil fuel industry has a long history of using misinformation to advance their profits at our expense. Still, this is upsetting and it’s actively misleading many concerned consumers.

The Plastics Industry Association is currently lobbying to quash plastic bag bans, even going so far as requesting that the United States Department of Health and Human Services publicly declare that banning single-use plastics during a pandemic is a health threat. Click here to read their letter.

The spread of misinformation has led many of us to question whether it’s okay to continue using reusable bags for our occasional, ultra-cautious grocery trips.

In a study cited by the Plastics Industry Association in their letter to the US DHHS, researchers at the University of Arizona and Loma Linda University found that reusable bags can contain bacteria, and users don’t wash reusable bags very often. The study was funded by the American Chemistry Council, which represents major plastics and chemicals manufacturers. Most notably: the study recommends that shoppers simply wash their reusable bags, not replace them.

There is no evidence that single-use plastics are safer than reusable items, and it’s important for all of us to recognize that single-use plastics have a number of opportunities to become contaminated during their manufacture, distribution, inventory stocking, and use. They are exposed to open air and surfaces like any other item you may be concerned about cross-contamination from. Single-use plastics could only be proven more sanitary if packaged individually in sterile conditions and handed to the customer in intact sterile packaging—much like you would imagine a syringe is packaged before use to draw blood. Clearly, that isn’t practical or realistic.

Here’s a breakdown of our options based on currently available scientific evidence:

The New England Journal of Medicine, the world’s leading medical journal for over 200 years, published data in mid-March of this year that shows SARS-CoV-2 is more stable and has a longer lifetime on plastic and stainless steel than on copper or cardboard. Viable SARS-CoV-2 was detected up to 72 hours after application on plastic, while none was measured on cardboard after 24 hours.

There is no evidence presented here to back the claim that “single-use plastics are often the safest choice” as has been pushed upon the US DHHS. In fact, the findings suggest that cardboard is a safer single-use material than plastic with respect to COVID-19 viability.  

Another scientific study focused on the stability of SARS-CoV-2 in different environmental conditions showed that the virus is more stable on plastic than on printing or tissue paper, wood, cloth, glass, or banknotes. SARS-CoV-2 remained detectable on plastic for 4 days, while on paper it was not detected after 30 minutes, on wood or cloth after 1 day, and on banknotes after 2 day.

According to the Center for Disease Control, COVID-19 is most often spread directly from person-to-person. However, viral spread from contact with contaminated surfaces or objects is possible. Guidelines issued by the CDC do not make a distinction between the items this may include, so we can safely assume that their recommendations apply to single-use and reusable items equally.

Single-use items are not sterile and are bound to be exposed to microbes before reaching their end users. This means that handling a single-use plastic bag, utensil, container, or cup likely poses an equal risk of infection as any reusable item.

That said, Maine, Massachusetts, and a growing number of other states are still moving quickly to allow for delays and suspensions of plastic bag bans. In New Hampshire, the governor actually issued an emergency health order requiring stores to use single-use paper or plastic shopping bags. 

We, at Debris Free Oceans, acknowledge that the nature of COVID-19 poses unusual risks. The virus may be contracted and transmitted asymptomatically, and it is understandable that reusable items such as shopping bags may be an object of concern. We urge you to make that decision based on your individual circumstances, but acknowledge that banning reusable items is an unsupported attempt that will not be a long-term solution to cross contamination.

Judith Enck, a former regional administrator for the Environmental Protection Agency, has called the plastics industry’s recent actions “shameless” and exploitative. We agree with her statement that it is understandable to use single-use materials occasionally, when necessary or beyond our control, but “in terms of overturning or delaying laws, [Enck sees] no independent data that supports that move.”

We are all struggling in some way to navigate this new normal. Pro-environmental habits, plastic waste reduction among others, may bring about a sense of normalcy and fulfillment amidst all the current uncertainty. 

First and foremost, we strongly suggest that you wash all materials that may pose risks for cross contamination: reusables (bottles, bags, wash cloths) as well as commonly touched surfaces (steering wheel, door handles, cell phone, credit cards and wallet). If you find yourself under circumstances where you must resort to single-use materials, we suggest that you prioritize non-plastic alternatives in the best interest of your well-being and environmental health.

We stand in solidarity with all those who have made sacrifices to stay home, stay distanced, and protect our communities. We are privileged with the time and resources to consider reusables when so many of our neighbors, family members, friends, coworkers, and local leaders are charged with the challenges directly posed by this dangerous pathogen. Adhering to the guidance of public health professionals is the least we can do to support the courage and generosity of the healthcare workers and first responders at the frontlines of this crisis. 

In this graphic, projections indicate that we’ll have produced 26 billion tons of plastic waste by 2050. Primary waste refers to plastic becoming waste for the first time. So, that value doesn’t include waste from plastic that has been recycled. [G. Grullón, Science]

You may have already seen pictures in the news and throughout social media much like this decomposing albatross with a stomach full of plastic waste.

These incidents are often caused by the plastics we use and discard on land. Plastic litter is a more common problem in wealthy, industrialized countries like the US and UK. Although we have the systems and resources to manage large streams of collected waste, our access to limitless single-use products and the other conveniences have brought us out of touch with the value of the materials we discard and the immediate effects of tossing them as litter. Although our waste management systems are not flawless, following common sense standards for disposal is tremendously better than leaving trash behind in an unintended spot.

[Dan Clark, US Fish and Wildlife Service]

No matter how they find their way into the environment, macro-plastics can be easily mistaken by marine life for food.

The jellyfish-like movement of a drifting plastic bag may come to mind, but this problem isn’t limited to physical appearances. A recent study conducted at the University of North Carolina at Chapel Hill found that sea turtles responded most similarly to the smell of “biofouled” plastics as to that of their own food. This finding suggests that the unavoidable accumulation of microbes, algae, plants and small animals on the surface of plastic marine debris makes it more enticing for turtles to eat our trash.

Scientists estimate that nearly all seabirds and over half of our oceans’ sea turtles have ingested plastic. This blocks their digestive tracts and diminishes their appetite, resulting in malnutrition and population decline.

Fragments of plastic bags found in a juvenile green turtle’s stomach.[Victoria Gonzalez Carman, Business Insider]

Macro-plastics cannot chemically degrade, but they do physically breakdown into microplastic bits that are difficult to see or filter out of the water. Those tiny bits contaminate our drinking water and accumulate in seafood when consumed by fish. Even more often than macro-plastics, these tiny bits of microplastics are unintentionally consumed by marine and freshwater species.

Once ingested, microplastics break down into even teenier nano-plastics that can penetrate cell membranes⁠. This causes severe inflammation, breakage and decay of tissues in the gastrointestinal tract, absorption of harmful chemical additives, and often a stimulus response to toxicity. According to one study on the effects of nano-plastics, exposed fish exhibited severely altered feeding and shoaling behavior and metabolic function.

How does this affect human health?

Researchers from the University of California Davis and University of Hasanuddin found plastic debris in the majority of fish species sampled during their studies, all of which were marketed for human consumption. Notably, different streams of waste affected the two regions: textile fibers were found in 67% of species living off of the West coast of the US while larger microplastic debris were found in 55% of the species tested from Indonesia.

If the issue goes beyond marine species, into our drinking water and uptake by plant nutrients, how can we protect our health and address this issue over the long-term?

Survey your day-to-day activities and gradually phase out the non-essential single-use plastic products. Reducing your individual plastic consumption and opting for reusable or biodegradable alternatives will set an example for your family, friends, peers, and coworkers that’ll create a ripple effect of positive impact. When we all become stronger advocates for responsible consumption, we start to create shifts in social norms that can affect producers’ activities.

Odds are, you already have loads of plastic products at home. Don’t just throw them away! Refill, reuse, and repurpose the items you’ve already purchased or received as packaging. You will maximize utility to continue enjoying the durability of plastics while reducing your demand on new products/materials.

Advocate for responsible disposal and management of plastic waste in your home, at school, at work, at businesses you frequent, and to your local government. Spread the “trash talk” by sharing your knowledge to support a waste-conscious culture. In the United States, most of us enjoy the privilege of not seeing where the items that we throw “away” end up. That means we are all that much more responsible for learning about how we can be more proactive in reducing the waste we create and holding large polluting corporations accountable for their impacts.

Support or engage in research on the environmental and biochemical effects of plastic production, plastic consumption and use, or plastic waste. Simply sharing the results of intriguing new studies on social media can help to spread word on important findings!

With the rapid spread of sensational images and heart-wrenching video clips capturing the physical impacts of marine debris, many of us have been faced with the reality that plastic is the least favorable material for environmental health. Social media and digital campaigns help these stories to spread rapidly, but conflicting messages about different materials may also create unproductive online debates.

What makes this conveniently durable, widespread material more harmful than alternatives? The answer lies in the process: the life cycle of plastics.

Plastics are a category of synthetic polymers. They were designed by chemists seeking a strong, lightweight, and flexible material for consumer products. Polymers abound in nature! Cellulose, the material that makes up the cell walls of plants, is a very common natural polymer.

Synthetic, man-made polymers may be derived from natural substances like cellulose, but more often they are made using the plentiful carbon atoms in fossil fuels (such as methane gas or petroleum). These inputs allow for especially long branching to occur during polymerization chemical reactions.

Since humans learned how to create and manipulate synthetic plastics nearly 150 years ago, they’ve become a more prominent part of our lives. Most consumer products are made using some type of plastic polymer and many are surrounded by plastic packaging.

Extraction

The first step in creating a plastic product is the extraction of crude oil or methane gas. There are two main methods for these large-scale operations: mining and drilling.

Mining is used to extract solid fossil fuels by digging, scraping, or otherwise exposing buried resources. This often results in huge volumes of excess rock and soil being dumped into adjacent valleys and streams, affecting marine life and water flow. Extraction sites are also often left with poor soil and damaged land that is more prone to mudslides, landslides, flashfloods, and toxic water pollution in adjacent communities.

One Harvard University study assessed the life cycle costs and public health effects of coal from 1997 to 2005. The researchers found a link to lung, cardiovascular, and kidney diseases (such as diabetes and hypertension) and an elevated occurrence of low birth rate and pre-term births associated with surface mining practices. The total estimated cost came out to $74.6 billion every year, equivalent to 4.36 cents per kilowatt-hour of electricity produced.

Unconventional extraction methods such as natural gas hydraulic fracturing or ‘fracking’ have received a great deal of attention from advocates. Environmental effects of fracking include, but are not limited to, methane and toxic aerosol emissions, resource depletion, harmful wastewater contamination, and increased potential for oil spills and earthquakes. Importantly, all methods of fossil fuel extraction impose massive costs for fenceline communities that live, breathe, and work adjacent to these harmful industrial activities.

Refinement and Cracking

After fossil fuel extraction, the raw materials are shipped to a refinery. The goals of refinement are to derive the building blocks for plastic production: ethane from crude oil and propane from natural gas. At a cracking plant, ethane and propane are then chemically broken down into ethylene and propylene.

Processing and Manufacturing

Chemical modification of ethylene and polyethylene through catalyzed polymerization produces resins. Resins are the core ingredient used to produce the durable, flexible plastics we’ve all grown dependent upon. This chemical processing can be carried out in several different ways, leading to a variety of plastic products. That’s what those numbers on the bottom of many plastic products are used to indicate!

Resins are subject to high temperature and pressue, then cooled in order to make pre-production plastic pellets called ‘nurdles.’ These plastic nurdles are the input used by manufacturers to mold and form the plastic products we use.

For example, polyethylene plastics are used to make supermarket bags and water bottles. Meanwhile, polystyrene is best known in its brittle form marketed as Styrofoam, but the same chemical building blocks are used to create toy figurines and CD cases.

Differences in the end products of plastic production are partly due to use of chemical additives that may enhance or suppress chemical properties. When mismanaged or littered plastic waste accumulates in our oceans as marine debris, plastic additives pose notable eco-toxicological risks for marine species and humans.

Distribution and Consumption

Since 1950, approximately 9.2 billion tons of plastic have been produced— 40% of which comes from single-use products such as shopping bags, cutlery, and take-out-ware. Check out this National Geographic video to learn more!

Individuals have the power to change the prominence of plastic in the consumer products industry. By changing our purchasing priorities and seeking more plastic-free alternatives, we can urge companies to embrace more environmentally-favorable materials and create more durable, reusable products.

Waste Management

Given all the resources and energy used to produce each plastic product, it’s important that we responsibly use and dispose of any plastics we already own. We can re-use, re-purpose, and up-cycle the plastics we have to make the most of their use before discarding them. This can be as simple as storing batteries in an empty take-out container or using a frayed toothbrush to clean hard to reach crevices in your coffee maker or fish tank. Get creative!

In Miami-Dade and Broward County, hard plastic narrow-neck bottles may be recycled in municipal single-stream recycling bins. Plastic grocery bags, toothbrushes, clamshell containers, and food packaging are only recyclable through third-party entities such as Terracycle or your local grocery store. They are considered contamination in your curbside recycling bin.

When plastics are separated for recycling, they are transported to a materials recovery facility for sorting. Then, they are taken to a reclaiming plant where the material is flaked, washed, and formed into new resin nurdles for manufacturing.

Recycling may be the best way to dispose of plastics that can no longer be re-used, but it is important to understand that recycling is not a long-term solution for the plastic waste crisis. Recycling is logistically challenging, energy-intensive, and can be counterproductive by reinforcing plastic consumption. Plastics are also not infinitely recyclable. Each time the material is flaked and reprocessed into nurdles, it produces a lower quality plastic that will ultimately lose its ability to be recycled.

Problems presented by the entire life cycle of plastics must best addressed by a combination of (1) increased consumer education and motivated reduction in plastic purchases and (2) regulation of plastic producers and polluters to minimize the production of plastics and harmful effects of their industrial activities.